Gear-shifting mechanism



1,643,729 Sept 27,1927' A. G. WAGNER GEAR SHIFTI'NG MECHANIS M Filed Ost. 25, 1925 l 4 Sheets-Sheet l Syvum/tifo@ /Qfr Mya/vf@- I 1,643 729 Sept. 27, 1927. A. G. WAGNER GEAR SHIFTING MECHANISM Filed Oct. 25. 1925 l{Sheets-Sheet 2 ammi! 5 I 2 l 'D Sept 7 1927 A. G. WAGNER GEAR SHIFTING MECHANISM Filed Oct. 2.3, 1925 4 Sheets-Sheet 5 mkv sept. 27 -1927. 1,643,729

A. G. WAGNER GEAR SHIFTING MECHANISM Filed oct. 23, 1925 4 sheets-sheet 4 A255527' 6. l/l//YG/Vff? l m @wm JEM@ Gttozmg S CII Patented Sept. 27, 1927.v

UNITED STATES PATENT OFFICE,v

ALBERT G. WAGNER, OF CINCINNATI, OHIO, ASSIGNOR 'IO THE VJEMB COMPANY, OF

CINCINNATI,v OHIO, A CORPORATION OF OHIO.l l

GEAR-SHIFTING MECHANISM.

Applicationmed october 23, 1925. serial No. 64,369.

This invention relates to gear shifting mechanism for automobiles and the object of my invention is to provide a selective gear shifter, that is one in which the gears may be set for the desired gear only when the clutch `is disengaged, the re-engagement kof the clutch automatically completing the shifting of the gear. l

y Another object of theinvention is to provide a selective gear shifting mechanism of compact form which may be enclosed within a cover of such shape' that it'may replace the ordinary cover of a transmission case.

I accomplish the above and other objects of the invention which will be apparent as the description proceeds by means of the device shown in the accompanying drawings in which Fig. 3 showing the selector body and the parts engaged thereby in dotted lines; and

Figure 6 is a top plan of the shifting fork connection.

Gn the drawings in which like reference characters indicate like parts on all the figures thereof, 1 indicates the transmission case .of an automobile, in which is mounted at one with change speed gears on an idler shaft" (not shown) asis common in change speed gearing of the usual type.

Mounted in the upper part of the transmission case are two slide rails 7, Svwhich carry7 the gear forks 9, 10, respectively. In order to hold the slide rails in the selected position, they may be and ,preferablyv are 'transmission case cover.

provided with three notches which are adapted to be engaged by spring pressed ball plu'ngers mounted in suitable hores in the One extremity of the hub of gear 5 is provided with a groove 11 around which the shifting fork 9 is adapted to fit, the opposite extremity of the hub being formed to engage the clutch 1Q to couple the shaft'Q to the shaft'B. The hub of the gear 6 is likewise provided with a similar groove 13 into which the yfork may bermoved. The gears 5 and 6 may thus be shifted on'the Vtransmission shaft by the shifting forks 8, 9, the gear 5 to mesh with the second and third speed gears and the gear 6 with first and reverse. Y

The shifting forks 9 and 10 are each provided With a sleeve 14 by means of Which they are secured to the slide rails 7, 8. Each sleeve is provided with two lugs 15 between which the cooperating shifting lever is adapted to fit when it is desired to move the slide rail and the fork into engagement with the gear hub. The forks are secured to the sleeves in such position that they are angularly disposed with respect to each other as shown in Figure 4, so that they will properly span the transmission shaft but `will avoid 'interference with each other. y

In order to operate the slide rails and the .shifting forks according to the setting'of a selector rod, while the clutch is disengaged,

Y I have provided the following mechanism enclosed within a suitable supplemental case cover of the transmission case'and which serves to protect the mechanism contained therein.

Disposed within the supplemental case above the slide rails is a transverse rock shaft 17 on which are rotatably supported thetwo shifting levers 18, 19. These levers are provided. with downwardly extending portions 20. 9,1 which engage with and operate the gear forks 9, 10, and are provided also with upwardly extending portions 20, 21 which carry rollers 22, 23 for a purpose to be later explained.

. Mounted above the shifting levers 18 and .19 and adapted to engage the same is a. shifting element Q4.'y This shifting element has a bearing fit at one end on the slidable selector rod 25 being supported thereon between collars 26 pinned on the'rod. The opposite extremity of the shifting element is provided with an elongated slot 27 through which passes 4a lrod 28. I

The shifting element 24 is formed With two cam faces 29, 3G on opposite sides thereof in Which the rollers 22, 23 lof' the shifting levers 18, 19 are adapted to ride. T he rod 28 may be operated to rock the shifting element 2li on the selector'v rod 25 through the medium of lever 31 pinned to a shaft 28 which is operated in its turn by the clutch ile levers32-v .e f

The rselector rod 25 is 'mounted in sleeves 33, 311 the transmission case, the sleeve 33 beine' lbored to receive a spring pressed "ball pl gert). The selector rod is provided vv h notches 3G intowhich the 'plunger 35 is adapte-dito engage providing means to maintain the selector lrod inthe desired posil'tion. a e, Y Theselector rod 25vis provided at its outer vend With a studv 37 which is engaged in a y.slot 38 'in yone end of an angle leverl 39 vvhich is fulcriimedlat 'its angle 'upon the side of lthe transnliissionfcas'e and Wlfiich is yoperallole through the medium of a setting rod l() conveniently located on vthe steeringv Wheel or. yother suitable place near the chauffeur. p e

` In o'i'der to operate the gear setting mechanism j'vvhich constitutesl this invention, the cluteh is first disengaged by depressing the clutch pedal, Xvhereupon the lever carried thereby lifts the shifting element 2a to the position 'shown in dotted linesy in Figure 3 through the medium of the levers 31 and ythe shaft 28. This inovementrof the shifting element V'221, actuates the shifting lever 18 or 19, ivith which it is Vin engagement, the rollers 22A or 23'carrifed thereby riding in the camrecesses 2 9 or 30, thus throwing the levers into neutral position. Itis to be noted that one of the levers only will be. in engagement .viiththe shifting element at one time, the other lever being in neutral position. This movement ofthe lever Will take place upon operation of the shifting elementres gardless ofthe previous position of the lever. The levers being in neutral position and the shifting element in its upper position,

it may then be moved to engagement with l thegdesir-ed lever to effect the desired gear shift. To accomplish this result, the setting rod Oils aetuated to `move the selector rod 25 inward so that 4the shifting element 24; secured thereto will be moved to the coi responding position Where it may operatively eng'age one of the shifting levers 18 and 19. In the event thai-.the selector rod is niovedfto ya neutral position the shifting element yvvill be moved thereby to al position between vthe 'two shifting levers. The selector rod isjhelld in "the selected position by thel engagementfof thespring pressed .plunger 35,'With one ofthe notches 36.

The shifting rod having been moved to the selected positionover the lever which operates the desired gear, the Yclutch is reenga'ged. When the clutch is reengaged, the shifting element Will return to the `full line position shown in Fig. 3. During this return movement of the shifting element, the

roll *r on :the shifting lever Will ride in theV Having thus fully described my invention,

fivhat 1 claim as `'new and desire tos'ecure by rLetters Patentof the United States is 1 1n 'a ,selective gear ffshifti'ng mechanism, inc a clutch, a slidablese'lector rod, a

shi ting element secured thereto, a ro'clrablyA mounted shaft, one end foff said' shifting element being connected to said shaft, gear lshifting leversv adapted' to 'be selectively engagedy by said shifting element for move-v ment :to gear engaging and neutral positions,

means whereby the disengagement ofthe clutch Willjrock the shifting element'to vnmove the levers to neutral position. f

e 2; la 'selective gear shifting mechanism, including a clutch, a 'slidable selector rod, a rockably mounted shaft, a shifter element pivoted at o'ne Vend to the selector 'rod Vand loosely connected to the shaft at its other end, gear shifting levers mounted belen7 said shifter elementla'nd yadapted to be selectively engaged thereby for movement .togear eni g'aging and neutral positions, connections `betvv.een the clutch v'and the s haft whereby the disengagement of the clutchwill rock the shaft and vshifting `element to move the levers to neutral position. y Y` e 3. Ina selective gear shifting mechanism, a c on'ibined clutcl'ifcontrol and gear shifting pedal, a pivotal'ly mounted shifting' .elem-ent, a gear actuatingvlevercooperating therewith, means on said shifting element for vmoving said lever to gear actuating or neutral position, and means whereby actuation ofl the pedal moves the shifting element 'onY itsY pivot to an inoperative positionand means l v f" v whereby themovement of the shifting element to kits inoperative position moves the lever to its neutral position.

4. Ina selective gear shifting mechanism,

lll)

a slidable selector rod, a. roclrablymounted shaft, a shifting element pivoted at one end lto the selector'rod and loosely connected to the 4shaft at its other end, gear shifting levers mounted Vbelow saidv shifting element .and adapted to be engaged thereby, said shaft being adapted to rock the shifting ele-V ment to one extreme position to move the gear shifting levers to neutral position and to rock it to a second extreme position to selectively move one of said levers to gear shifting position.

5. In a selective gear shifting mechanism, the combination of a shifting element, a gear actuating' lever cooperating therewith, inclined means on said shifting element for moving said lever to gear actuating position or to neutral position, clutch disengaging means for moving said shifting element on its pivot thereby actuating the lever to neutral position, and means whereby the shifting element may be moved in a transverse direction for setting the same only when the lever is in neutral position.

6. In agear shifting mechanism, a p1urality of pivotally mounted gear shifting levers, a shifting element, said shifting element having cam recesses on the opposite faces thereof, means on said gear shifting levers adapted to ride in said cam recesses, whereby said gear shifting levers are moved in opposite directions on their pivots.

In testimony whereof I hereunto affix my signature.

ALBERT G. WAGNER. 

